allegiance vs loyalty

allegiance and loyalty both are nouns.

Word	Noun	Adjective	Verb	Adverb
allegiance	Yes	No	No	No
loyalty	Yes	No	No	No

As nouns, allegiance and loyalty are synonyms defined as:

allegiance and loyalty: the act of binding yourself (intellectually or emotionally) to a course of action

Other synonyms of allegiance include commitment, dedication.

As nouns, loyalty is a hypernym of allegiance; that is, loyalty is a word with a broader meaning than allegiance:

allegiance: the loyalty that citizens owe to their country (or subjects to their sovereign)
loyalty: the quality of being loyal

Other hypernyms of allegiance include trueness.

allegiance (noun)	loyalty (noun)
the act of binding yourself (intellectually or emotionally) to a course of action	the act of binding yourself (intellectually or emotionally) to a course of action
the loyalty that citizens owe to their country (or subjects to their sovereign)	the quality of being loyal
	feelings of allegiance